Richard Castle: I was half expecting moose and squirrel. (responding to Jimmy Lennon at his chop shop)
This is a reference to Rocky and Bullwinkle from the 1950's television show, The Frostbite Falls Review created by Jay Ward and Bill Scott. The two characters soon got their own show Rocky and His Friends on ABC (1959-1961) and then The Rocky and Bullwinkle Show on NBC (1961 to 1973). The scheming villain Boris Badenov always referred to Rocky and Bullwinkle as "moose and squirrel".